This is my 9th year cosplaying, and my younger brother is finally going to be going to a con with me! So I'm looking for some cute ideas that we could cosplay together. (For example, one of our costumes this year with one of my friends is the Royal Family from Katamari Damacy)

He's 13 and I'm 23.

Any ideas? We're pretty much open to anything. Anything that we haven't seen can be tracked down and watched/played anyways.

Reiko Mikami and Kouichi Sakakibara from Another! They're actually aunt and nephew, but their age difference is.... Well, he's a 15-year-old protagonist, and she's a pretty 28-year-old.

Ninian and Nils from FE7? You'd have to take slight artistic liberty with Nils' physical age, though both characters are over a thousand years old.

Speaking of Fire Emblem... Tethys and Ewan are also siblings. Once more, you'd probably have to age Ewan a few years. He probably is about your brother's age, but "younger siblings" are made to look much younger as contrast to the elder sibling.

Nora and Hope Estheim from FFXIII? Mother and son, but once again, the mother is the typical video-game eternally youthful pretty type.